FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5

E. Bianchi; C. J. Chandler; C. Ceccarelli; C. Codella; N. Sakai; A. Lopez-Sepulcre; L. T. Maud; G. Moellenbrock; B. Svoboda; Y. Watanabe; T. Sakai; F. Menard; Y. Aikawa; F. Alves; N. Balucani; M. Bouvier; P. Caselli; E. Caux; S. Charnley; S. Choudhury; M. De Simone; F. Dulieu; A. Duran; L. Evans; C. Favre; D. Fedele; S. Feng; F. Fontani; L. Francis; T. Hama; T. Hanawa; E. Herbst; T. Hirota; M. Imai; A. Isella; I. Jimenez-Serra; D. Johnstone; C. Kahane; B. Lefloch; L. Loinard; M. J. Maureira; S. Mercimek; A. Miotello; S. Mori; R. Nakatani; H. Nomura; Y. Oba; S. Ohashi; Y. Okoda; J. Ospina-Zamudio; Y. Oya; J. Pineda; L. Podio; A. Rimola; D. Segura Cox; Y. Shirley; V. Taquet; L. Testi; C. Vastel; S. Viti; N. Watanabe; A. Witzel; C. Xue; Y. Zhang; B. Zhao; S. Yamamoto

doi:10.1093/mnrasl/slaa130

FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5

E. Bianchi, C. J. Chandler, C. Ceccarelli, C. Codella, N. Sakai, A. Lopez-Sepulcre, L. T. Maud, G. Moellenbrock, B. Svoboda, Y. Watanabe, T. Sakai, F. Menard, Y. Aikawa, F. Alves, N. Balucani, M. Bouvier, P. Caselli, E. Caux, S. Charnley, S. ChoudhuryM. De Simone, F. Dulieu, A. Duran, L. Evans, C. Favre, D. Fedele, S. Feng, F. Fontani, L. Francis, T. Hama, T. Hanawa, E. Herbst, T. Hirota, M. Imai, A. Isella, I. Jimenez-Serra, D. Johnstone, C. Kahane, B. Lefloch, L. Loinard, M. J. Maureira, S. Mercimek, A. Miotello, S. Mori, R. Nakatani, H. Nomura, Y. Oba, S. Ohashi, Y. Okoda, J. Ospina-Zamudio, Y. Oya, J. Pineda, L. Podio, A. Rimola, D. Segura Cox, Y. Shirley, V. Taquet, L. Testi, C. Vastel, S. Viti, N. Watanabe, A. Witzel, C. Xue, Y. Zhang, B. Zhao, S. Yamamoto

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Abstract

The study of hot corinos in solar-like protostars has been so far mostly limited to the Class 0 phase, hampering our understanding of their origin and evolution. In addition, recent evidence suggests that planet formation starts already during Class I phase, which therefore represents a crucial step in the future planetary system chemical composition. Hence, the study of hot corinos in Class I protostars has become of paramount importance. Here, we report the discovery of a hot corino towards the prototypical Class I protostar L1551 IRS5, obtained within the ALMA (Atacama Large Millimeter/submillimeter Array) Large Program FAUST (Fifty AU STudy of the chemistry in the disc/envelope system of solar-like protostars).We detected several lines from methanol and its isotopologues (13CH3OH and CH2DOH), methyl formate, and ethanol. Lines are bright towards the north component of the IRS5 binary system, and a possible second hot corino may be associated with the south component. The methanol lines' non-LTE analysis constrains the gas temperature (100 K), density (1.5 × 108 cm3), and emitting size (10 au in radius). All CH3OH and 13CH3OH lines are optically thick, preventing a reliable measure of the deuteration. The methyl formate and ethanol relative abundances are compatible with those measured in Class 0 hot corinos. Thus, based on this work, little chemical evolution from Class 0 to I hot corinos occurs.

Original language	English (US)
Pages (from-to)	L87-L92
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	498
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slaa130
State	Published - Oct 1 2020
Externally published	Yes

Keywords

Astrochemistry
ISM: molecules
stars: formation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnrasl/slaa130

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Bianchi, E., Chandler, C. J., Ceccarelli, C., Codella, C., Sakai, N., Lopez-Sepulcre, A., Maud, L. T., Moellenbrock, G., Svoboda, B., Watanabe, Y., Sakai, T., Menard, F., Aikawa, Y., Alves, F., Balucani, N., Bouvier, M., Caselli, P., Caux, E., Charnley, S., ... Yamamoto, S. (2020). FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5. Monthly Notices of the Royal Astronomical Society: Letters, 498(1), L87-L92. https://doi.org/10.1093/mnrasl/slaa130

Bianchi, E, Chandler, CJ, Ceccarelli, C, Codella, C, Sakai, N, Lopez-Sepulcre, A, Maud, LT, Moellenbrock, G, Svoboda, B, Watanabe, Y, Sakai, T, Menard, F, Aikawa, Y, Alves, F, Balucani, N, Bouvier, M, Caselli, P, Caux, E, Charnley, S, Choudhury, S, De Simone, M, Dulieu, F, Duran, A, Evans, L, Favre, C, Fedele, D, Feng, S, Fontani, F, Francis, L, Hama, T, Hanawa, T, Herbst, E, Hirota, T, Imai, M, Isella, A, Jimenez-Serra, I, Johnstone, D, Kahane, C, Lefloch, B, Loinard, L, Maureira, MJ, Mercimek, S, Miotello, A, Mori, S, Nakatani, R, Nomura, H, Oba, Y, Ohashi, S, Okoda, Y, Ospina-Zamudio, J, Oya, Y, Pineda, J, Podio, L, Rimola, A, Segura Cox, D, Shirley, Y, Taquet, V, Testi, L, Vastel, C, Viti, S, Watanabe, N, Witzel, A, Xue, C, Zhang, Y, Zhao, B & Yamamoto, S 2020, 'FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5', Monthly Notices of the Royal Astronomical Society: Letters, vol. 498, no. 1, pp. L87-L92. https://doi.org/10.1093/mnrasl/slaa130

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title = "FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5",

abstract = "The study of hot corinos in solar-like protostars has been so far mostly limited to the Class 0 phase, hampering our understanding of their origin and evolution. In addition, recent evidence suggests that planet formation starts already during Class I phase, which therefore represents a crucial step in the future planetary system chemical composition. Hence, the study of hot corinos in Class I protostars has become of paramount importance. Here, we report the discovery of a hot corino towards the prototypical Class I protostar L1551 IRS5, obtained within the ALMA (Atacama Large Millimeter/submillimeter Array) Large Program FAUST (Fifty AU STudy of the chemistry in the disc/envelope system of solar-like protostars).We detected several lines from methanol and its isotopologues (13CH3OH and CH2DOH), methyl formate, and ethanol. Lines are bright towards the north component of the IRS5 binary system, and a possible second hot corino may be associated with the south component. The methanol lines' non-LTE analysis constrains the gas temperature (100 K), density (1.5 × 108 cm3), and emitting size (10 au in radius). All CH3OH and 13CH3OH lines are optically thick, preventing a reliable measure of the deuteration. The methyl formate and ethanol relative abundances are compatible with those measured in Class 0 hot corinos. Thus, based on this work, little chemical evolution from Class 0 to I hot corinos occurs.",

keywords = "Astrochemistry, ISM: molecules, stars: formation",

author = "E. Bianchi and Chandler, {C. J.} and C. Ceccarelli and C. Codella and N. Sakai and A. Lopez-Sepulcre and Maud, {L. T.} and G. Moellenbrock and B. Svoboda and Y. Watanabe and T. Sakai and F. Menard and Y. Aikawa and F. Alves and N. Balucani and M. Bouvier and P. Caselli and E. Caux and S. Charnley and S. Choudhury and {De Simone}, M. and F. Dulieu and A. Duran and L. Evans and C. Favre and D. Fedele and S. Feng and F. Fontani and L. Francis and T. Hama and T. Hanawa and E. Herbst and T. Hirota and M. Imai and A. Isella and I. Jimenez-Serra and D. Johnstone and C. Kahane and B. Lefloch and L. Loinard and Maureira, {M. J.} and S. Mercimek and A. Miotello and S. Mori and R. Nakatani and H. Nomura and Y. Oba and S. Ohashi and Y. Okoda and J. Ospina-Zamudio and Y. Oya and J. Pineda and L. Podio and A. Rimola and {Segura Cox}, D. and Y. Shirley and V. Taquet and L. Testi and C. Vastel and S. Viti and N. Watanabe and A. Witzel and C. Xue and Y. Zhang and B. Zhao and S. Yamamoto",

year = "2020",

month = oct,

day = "1",

doi = "10.1093/mnrasl/slaa130",

language = "English (US)",

volume = "498",

pages = "L87--L92",

journal = "Monthly Notices of the Royal Astronomical Society: Letters",

issn = "1745-3925",

publisher = "Oxford University Press",

number = "1",

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TY - JOUR

T1 - FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5

AU - Bianchi, E.

AU - Chandler, C. J.

AU - Ceccarelli, C.

AU - Codella, C.

AU - Sakai, N.

AU - Lopez-Sepulcre, A.

AU - Maud, L. T.

AU - Moellenbrock, G.

AU - Svoboda, B.

AU - Watanabe, Y.

AU - Sakai, T.

AU - Menard, F.

AU - Aikawa, Y.

AU - Alves, F.

AU - Balucani, N.

AU - Bouvier, M.

AU - Caselli, P.

AU - Caux, E.

AU - Charnley, S.

AU - Choudhury, S.

AU - De Simone, M.

AU - Dulieu, F.

AU - Duran, A.

AU - Evans, L.

AU - Favre, C.

AU - Fedele, D.

AU - Feng, S.

AU - Fontani, F.

AU - Francis, L.

AU - Hama, T.

AU - Hanawa, T.

AU - Herbst, E.

AU - Hirota, T.

AU - Imai, M.

AU - Isella, A.

AU - Jimenez-Serra, I.

AU - Johnstone, D.

AU - Kahane, C.

AU - Lefloch, B.

AU - Loinard, L.

AU - Maureira, M. J.

AU - Mercimek, S.

AU - Miotello, A.

AU - Mori, S.

AU - Nakatani, R.

AU - Nomura, H.

AU - Oba, Y.

AU - Ohashi, S.

AU - Okoda, Y.

AU - Ospina-Zamudio, J.

AU - Oya, Y.

AU - Pineda, J.

AU - Podio, L.

AU - Rimola, A.

AU - Segura Cox, D.

AU - Shirley, Y.

AU - Taquet, V.

AU - Testi, L.

AU - Vastel, C.

AU - Viti, S.

AU - Watanabe, N.

AU - Witzel, A.

AU - Xue, C.

AU - Zhang, Y.

AU - Zhao, B.

AU - Yamamoto, S.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - The study of hot corinos in solar-like protostars has been so far mostly limited to the Class 0 phase, hampering our understanding of their origin and evolution. In addition, recent evidence suggests that planet formation starts already during Class I phase, which therefore represents a crucial step in the future planetary system chemical composition. Hence, the study of hot corinos in Class I protostars has become of paramount importance. Here, we report the discovery of a hot corino towards the prototypical Class I protostar L1551 IRS5, obtained within the ALMA (Atacama Large Millimeter/submillimeter Array) Large Program FAUST (Fifty AU STudy of the chemistry in the disc/envelope system of solar-like protostars).We detected several lines from methanol and its isotopologues (13CH3OH and CH2DOH), methyl formate, and ethanol. Lines are bright towards the north component of the IRS5 binary system, and a possible second hot corino may be associated with the south component. The methanol lines' non-LTE analysis constrains the gas temperature (100 K), density (1.5 × 108 cm3), and emitting size (10 au in radius). All CH3OH and 13CH3OH lines are optically thick, preventing a reliable measure of the deuteration. The methyl formate and ethanol relative abundances are compatible with those measured in Class 0 hot corinos. Thus, based on this work, little chemical evolution from Class 0 to I hot corinos occurs.

AB - The study of hot corinos in solar-like protostars has been so far mostly limited to the Class 0 phase, hampering our understanding of their origin and evolution. In addition, recent evidence suggests that planet formation starts already during Class I phase, which therefore represents a crucial step in the future planetary system chemical composition. Hence, the study of hot corinos in Class I protostars has become of paramount importance. Here, we report the discovery of a hot corino towards the prototypical Class I protostar L1551 IRS5, obtained within the ALMA (Atacama Large Millimeter/submillimeter Array) Large Program FAUST (Fifty AU STudy of the chemistry in the disc/envelope system of solar-like protostars).We detected several lines from methanol and its isotopologues (13CH3OH and CH2DOH), methyl formate, and ethanol. Lines are bright towards the north component of the IRS5 binary system, and a possible second hot corino may be associated with the south component. The methanol lines' non-LTE analysis constrains the gas temperature (100 K), density (1.5 × 108 cm3), and emitting size (10 au in radius). All CH3OH and 13CH3OH lines are optically thick, preventing a reliable measure of the deuteration. The methyl formate and ethanol relative abundances are compatible with those measured in Class 0 hot corinos. Thus, based on this work, little chemical evolution from Class 0 to I hot corinos occurs.

KW - Astrochemistry

KW - ISM: molecules

KW - stars: formation

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DO - 10.1093/mnrasl/slaa130

M3 - Article

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SN - 1745-3925

VL - 498

SP - L87-L92

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

FAUST I. The hot corino at the heart of the prototypical Class i protostar L1551 IRS5

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